I will never understand how it ______ that you failedin the examination for you are such a good student.

Did the policeman let you in?—No, ________ I told him who I was[ ]

________ an important role in a new movie，Andy has got a chance to become famous[ ]

Prices began to climb noticeably last year, with the monthly CPI figure _____ an 11 -year- high of 6.9 percent in November. [ ]

As John Lennon once said，life is_____ happens to you while you are busy making other plans.